Permanganate index analyzer

Abstract

The invention discloses a permanganate index analyzer, comprising a multi-way valve assembly, a peristaltic pump, a digestion assembly and a liquid discharging assembly. The multi-way valve assembly comprises a plurality of channels, all the channels are connected with an inlet of the peristaltic pump, and switch valves are arranged in all the channels. When a sample or a reagent is extracted, thecorresponding switch valve is opened, so that the corresponding channel is communicated with the inlet of the peristaltic pump. The peristaltic pump rotates to send the solution into the digestion cup of the digestion assembly, the heating structure heats the solution in the digestion cup, and the sample and the reagent react in the digestion cup to complete permanganate index measurement. And then the measured solution is discharged by the liquid discharging assembly. The permanganate index analyzer is matched with the peristaltic pump for use through the multi-way valve assembly, so as to complete the extraction of a sample and a reagent. The flow path of the permanganate index analyzer is simplified, the manufacturing cost and the maintenance cost are reduced, the failure rate of the permanganate index analyzer is reduced, and the stability and the convenience of the permanganate index analyzer are improved.

Description

technical field [0001] The invention relates to the technical field of water environment online monitoring equipment, in particular to a permanganate index analyzer. Background technique [0002] The permanganate index in surface water is a common index to reflect the pollution of organic and inorganic oxidizable substances in the water body. In the process of automatic monitoring of surface water, the permanganate titration method is often used to detect the permanganate index. The specific method of permanganate titration is as follows: take a certain volume of water sample, add an appropriate amount of potassium permanganate and sulfuric acid, fully mix and digest for a certain period of time, then add excess sodium oxalate for reduction, and finally add slowly For potassium permanganate, the titration end point is judged by the potential value or color mutation of the reaction solution, and the permanganate index of the water sample is reversed according to the consumpti...

AI Technical Summary

Problems solved by technology

[0004] In the prior art, automatic detection instruments usually use multiple peristaltic pumps to extract water samples, oxidants, reducing agents, etc., which leads to complex flow paths of automatic detection instruments and brings great difficulties to later operation and maintenance.

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